How can I see emails sent through my account (from outlook or other programs) in webmail?

I received an email from what looks to be my own account. Sender states they hacked my account. But I think it is a scam. What I want to do is to be able to see all emails sent through my account. But when I look in the sent folder - it only shows emails I sent directly from webmail. There must be a way to see all emails sent from my account in webmail or another part of Godaddy account management - regardless if outlook or other programs used my account.